Adjustable cavitator structure having double layer retractable sheet

1 . An adjustable cavitator structure having double layer retractable sheets, comprising a cavitator disposed at a head of an underwater vehicle, the cavitator comprises a cavitator body, a center of the cavitator body is connected to a center of the head of the underwater vehicle by means of a damper, a head fairing device is detachably connected to a front end of the cavitator body,

wherein the cavitator body is of a double-layer structure comprising a first layer and a second layer, each of the first layer and the second layer is provided with a plurality of cavitator disc face retractable sheets which are uniformly distributed around an axis of the cavitator body and are slidably connected to the corresponding first layer or second layer,

wherein the head of the underwater vehicle is provided with a buffer driving mechanism that drives the plurality of cavitator disc face retractable sheets to slide in a radial direction of the cavitator body, and the plurality of cavitator disc face retractable sheets and the cavitator body are spliced into a circle,

wherein the buffer driving mechanism comprises a plurality of airfoil adjusting sheets, a number of the plurality of airfoil adjusting sheets is matched with a number of the plurality of cavitator disc face retractable sheets, the plurality of airfoil adjusting sheets are uniformly distributed around the axis of the cavitator body, each airfoil adjusting sheet corresponds to one of the plurality of cavitator disc face retractable sheet, a rear end of each airfoil adjusting sheet is hinged with an outer edge of the head of the underwater vehicle, a side of each airfoil adjusting sheet close to its rear end is hinged with one end of a first buffer retractable arm and a side of that close to its front end is hinged with one end of a second buffer retractable arm, the other end of the first buffer retractable arm is hinged with a front end face of the head of the underwater vehicle, the other end of the second buffer retractable arm is fixedly connected to an upper part of a corresponding cavitator disc face telescopic sheet thereof, a cross section of each airfoil adjusting sheet is airfoil shape, and two adjacent airfoil adjusting sheets are closely attached.

2 . The adjustable cavitator structure having double layer retractable sheets according to claim 1 , wherein each of the plurality of cavitator disc face retractable sheets is fan-shaped and is provided with a groove accommodating the first layer or the second layer, sliding U-shaped limiting slots extending in a radial direction are machined on each of the first layer and the second layer, sliding limiting protrusions matched with the sliding U-shaped limiting slots are machined on each of the plurality of cavitator disc face retractable sheets, and the plurality of cavitator disc face retractable sheets arranged on the first layer are staggered with the plurality of cavitator disc face retractable sheets arranged on the second layer.

3 . The adjustable cavitator structure having double layer retractable sheets according to claim 1 , wherein each airfoil adjusting sheet is inside provided with a gas acceleration hole which is Tesla valve hole, a front end of the gas acceleration hole is communicated with a third jet port disposed at a front end of the airfoil adjusting sheet, and a rear end of the gas acceleration hole is in communication with a gas storage disposed in the underwater vehicle by means of a hose and a third vent valve.

4 . The adjustable cavitator structure having double layer retractable sheets according to claim 3 , wherein a booster engine is disposed at a tail of the underwater vehicle, a tail gas collection device is disposed in the underwater vehicle, wherein tail gas collection device comprises a turbo-inspiratory driving device, a first end of the turbo-inspiratory driving device is in communication with an exhaust end of the booster engine by means of a pipeline and a second end of the turbo-inspiratory driving device is in communication with an inlet of the gas storage.

5 . The adjustable cavitator structure having double layer retractable sheets according to claim 3 , wherein a front center of the cavitator body is provided with a first jet port, and the gas storage is in communication with the first jet port by means of a first vent pipeline system.

6 . The adjustable cavitator structure having double layer retractable sheets according to claim 5 , wherein the damper comprises a first outer sleeve which is provided with an oil storage chamber and a first piston rod inside, a front end of the first piston rod extends out of the first outer sleeve and is fixedly connected to the cavitator body, a rear end of the first piston rod is provided with a first piston, a part between the first piston and the front end of the first outer sleeve is provided with a tension spring sleeved on the first piston rod, a rear end of the first outer sleeve is fixedly connected to the head of the underwater vehicle, and a part between the rear end of the first outer sleeve and the first piston forms a first hydraulic oil chamber which is in communication with the oil storage chamber.

7 . The adjustable cavitator structure having double layer retractable sheets according to claim 6 , wherein the first vent pipeline system comprises a first vent pipe, a rear end of the first vent pipe is in communication with the gas storage, a first vent valve is disposed in the first vent pipe, a front end of the first vent pipe successively passes through a rear end center of the first outer sleeve and a center of the first piston and penetrates into the first piston rod and is in airtight sliding connection with inner walls of the first piston rod and the first piston, an inside of a third piston rod close to its front end is provided with a buffer gas chamber, a rear end of the buffer gas chamber is in communication with the front end of the first vent pipe, the buffer gas chamber is provided inside with a first pressure spring with an axis coinciding with an axis of the first piston rod, an end face of the first vent pipe abuts against the first pressure spring, a front end of the first piston rod is provided with a through hole in communication with the buffer gas chamber, and a front end of the through hole is in communication with the first jet port.

8 . The adjustable cavitator structure having double layer retractable sheets according to claim 5 , wherein the head fairing device comprises a head fairing and a connecting device, the head fairing is detachably connected to a front end of the connecting device, a rear end of the connecting device is detachably connected to the center of the cavitator body, and a head end of the connecting device is provided with a second jet port in communication with the first jet port.

9 . The adjustable cavitator structure having double layer retractable sheets according to claim 8 , wherein the connecting device comprises a connecting pipe fixed at a front end of the first jet port, two bolt mounting holes are symmetrically machined in a middle of the connecting pipe up and down, each of the two bolt mounting holes is mounted with a trapezoid fixing bolt, the two trapezoid fixing bolt are connected with each other by means of a second pressing spring, and a side of the trapezoid fixing bolt close to an axis of the connecting pipe is fixed with an electromagnet;

a rear end of a fairing fixing rod is provided with a connecting groove matched with the connecting pipe, and a slot matched with the trapezoid fixing bolt is machined on a wall of the connecting groove;

a front end of the fairing fixing rod is fixed with a connecting piece which is fixedly connected to an inner wall of a rear end of the head fairing; and

a second vent pipe is disposed in the faring fixing rod, a second ventage is disposed at the front end of the fairing fixing rod, and a front end of the second vent pipe is in communication with the second ventage and a rear end of the second vent pipe is in communication with the connecting groove.